风力发电偏航系统的PID-Fuzzy分段复合控制研究

风力发电机的偏航系统是一个典型的非线性系统,且难以建立精确的数学模型.采用常规的PID控制很难对系统取得良好的控制效果.为了解决这一难题,针对偏航系统设计出PID和模糊控制相结合的分段复合控制器,该控制器不需要被控对象的精确数学模型.由于在整个控制过程中的不同阶段采用不同的控制方式,即继承了常规PID控制无静差、静态稳定性好的特点,同时有兼有模糊控制适应能力强、动态性能好的优势.通过MATLAB仿真实验表明,该分段复合控制器能够满足偏航系统的控制要求,并取得了良好的控制效果.

Study on PID-Fuzzy Composite Control for Yaw System Of Wind Driven-Generator

The yaw system of the wind-driven is the typical non-linear system and difficulty in establishing extract model. It is hard to control the system more better by using routine PID. In order to solve the problem, this paper proposed a new staged composite control method combining traditional PID and fuzzy control for yaw system, which doesn't require the controlled object accompanied with exact model. By applying different methods to varied phases, it not only is able to inherit the low error and good static stability of routine PID, but also has fuzzy control's advantage of fully acclimatizing itself to the object. The staged composite control method can meet the requirement of the yaw system ,and get good result by MATLAB simulation.